TY - JOUR
T1 - Raman and infrared studies of the metal-insulator transition in BaCo1-xNixS2
AU - Sugai, S.
AU - Yamane, N.
AU - Kashima, S.
AU - Takenaka, K.
AU - Sasaki, H.
AU - Sato, M.
AU - Shamoto, S.
N1 - Funding Information:
The authors are grateful to M. Kamada and M. Hasumoto at UVSOR facility for useful advice and skillful technical assistance. This work was supported by CREST of the Japan Science and Technology Corporation.
PY - 2000/6/1
Y1 - 2000/6/1
N2 - The electronic states near the insulator-metal transition of stoichiometric BaCo1-xNixS2 were investigated utilizing the different selection rule for Raman scattering from reflection spectroscopy. The electronic Raman component at low energies is large even in the insulating phase at x = 0. The spectral intensity is preserved from 300 to 20 K in the insulating phase (x≤0.18), whereas in the metallic phase (x≥0.24), the B1g and B2g spectra increase, as temperature decreases. It suggests that the change is induced by the itinerant electronic states through the mass-enhanced-type insulator-metal transition.
AB - The electronic states near the insulator-metal transition of stoichiometric BaCo1-xNixS2 were investigated utilizing the different selection rule for Raman scattering from reflection spectroscopy. The electronic Raman component at low energies is large even in the insulating phase at x = 0. The spectral intensity is preserved from 300 to 20 K in the insulating phase (x≤0.18), whereas in the metallic phase (x≥0.24), the B1g and B2g spectra increase, as temperature decreases. It suggests that the change is induced by the itinerant electronic states through the mass-enhanced-type insulator-metal transition.
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U2 - 10.1016/S0921-4526(99)00835-2
DO - 10.1016/S0921-4526(99)00835-2
M3 - Conference article
AN - SCOPUS:0033879692
SN - 0921-4526
VL - 281-282
SP - 627
EP - 628
JO - Physica B: Condensed Matter
JF - Physica B: Condensed Matter
T2 - Yamada Conference LI - The International Conference on Strongly Correlated Electron Systems (SCES '99)
Y2 - 24 August 1999 through 28 August 1999
ER -